用显微镜观察英文字母“Pb”看到的是“qd”．______（判断对错）_爱下问搜题

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问题解答题

用显微镜观察英文字母“Pb”看到的是“qd”．______（判断对错）

答案

显微镜下所成的像是实物的倒像．将“pb”写到纸上，将纸旋转180度我们会看到一个“qd”字．

故答案为：√

完形填空

完形填空。

     I am a student in Grade Three. I began to learn English the year before last. English isn't very   l   to learn. But I like it very much.
     2   do I study English?
     In the first year; I found   3   very difficult to memorize new words. At first I   4   a lot of time on them. I learned new words only   5   reading and writing them,   6  a few days later I forgot them. Later, I came to know how to do it well. I paid more
attention to   7   and spelling.
For example :

8 I have learned a lot of new words by heart. Every morning after I get up, I do some reading. At school I 9 to speak English with my classmates and go over 10 I have learned. Nothing is too hard if you put your heart into it.

( )1. A. hard
( )2. A. Why
( )3. A. this
( )4. A. took
( )5. A. with
( )6. A. and
( )7. A. pronunciation
( )8. A. By the way
( )9. A. join
( )10.A. that

B. excited
B. What
B. it
B. paid
B. for
B. but
B. words
B. In this way
B. lose
B. what

C. easy
C. Unless
C. that
C. spent
C. as
C. then
C. reading
C.. To begin with
C． try
C. which

D. fast
D. How
D. /
D. cost
D. by
D. however
D. writing
D. Later on
D. realize
D. when

文物是鲜活的历史，下列文物中最能反映商朝时期高超的青铜器铸造水平的文物是（）

A．兵马俑

B．司母戊鼎

C．竹木简

D．青花瓷